Lets expound on that!
Translation: He was an atheist, and so no religion (lefties forget to note that atheism IS a religion-the belief of nothing).
Second: no political affiliation? This assumes only R, D, and I. If the guy was a commie, then yep, no real legal affiliation, and those guys are usually real quiet commies.
My bet: Leftist atheist trump hater with brand spanking new slide fire stocks and rifles with a one time drop ship UPS of ammo to his front door recently.
A fairly safe bet.